Add "active" field to "dub describe" output. Fixes #393. Closes #577. ...

The active field determines if a certain dependency takes part in the build process (for the selected build configuration/platform).

Fixed: Compile error on anything before DMD 2.067.

Fixed: --data=linker-files misses linker files specified in dub.json.

Again, rework --data's handling of sourceFiles and static library dependencies.

Rework --data's handling of sourceFiles and static library dependencies.

Accidentally left in some old commented-out code.

Make targetLookup return an index into targets[], instead of a redundant set of data.

buildPath -> buildNormalizedPath

Replace 'getBuildSettingBitField' with 'to!BuildSetting'.

Add --data-0 to output --data= info null-delimited for (ex.) xargs -0

Fixed: When formatting output for a compiler, if the package is a library or a staticLibrary, then --data=libs never emits any output.

Replace --data-format with --compiler and --data-list.

Add 'dub describe --data-format=' to format the output of --data= directly for a compiler's commandline. Use --data-format=list to get the old list-style output.

Split --data=libs into two: --data=libs (for installed/system libs) and --data=lib-files (for dependency libs) ...

This is needed because compilers/linkers often expect the two types of libs to be passed in differently: System/installed libs (--data=libs) must be provided like "-Lname" which the linker automatically converts to "path/lib*.a". Non-installed libs, such as dub dependencies, are passed with full filepath just like an object file. Your linker may vary.

Add 'dub describe --data='.

Add "targets" field to "dub describe" output.

Change Build(Options/Requirements) to BitFlags.

Make the describe() API strongly typed.

Fix field existence check in Project.setUpgradeCache. ...

Accessing a non-existent key of a Json object inserts a Type.undefined entry if no entry of that name exists. This change includes this case and treats the key as unset.

Tolerate (with warning) path based sub package dependencies. See #586.

Fix detection of non-lowercase names and improve warning message. ...

The message now displays a format specific suggestion to modify the package description file.

Fix #560: --import-paths error when "configurations" section exists

Simplify some things. Use jq to test some of the dub describe output.

Add --import-paths and --string-import-paths as options for 'dub describe' instead of a new command. Add some scripts for testing the output of each, and a smoke test for 'dub describe'.

Add a command to dub to list all of the import paths for a project.

Fix bogus package name warning for sub packages

Fixup for previous commit.

Fix warnings on DMD master. See #541.

Add additional package name validity checks. See #540.

Improve upgrade suggestion message.